Is your Twitter photo surrounded by empty grayness? You need to upload a new header image!

AllTwitter explained why: “Twitter started rolling out its Facebook-a-like header photos to profiles back in September, and users who haven’t yet implemented this new functionality have until tomorrow (December 12th) to upload a suitable image. Otherwise, Twitter is going to force the change upon you, and you’ll be left with a default grey box. This isn’t permanent – you can change your header photo at any time. But, as Twitter says, the grey background isn’t exactly fun.”

We’ve embedded a video above that shows you how the new profile pictures work. Below, we’ve collected a few easy steps for how to add a Twitter header photo to your account.

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